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AprilaireAprilaire Model 6303 Control Panel ... with the Model 6504 Intelligent Zoned Comfort system, we have the right control for your ... A control panel coordinates the operation of the equipment with the ..... Proper control of the fan (G-terminal) for either electric.... Auxiliary output relays available to control humidifiers, electronic.

AprilaireModel 6404. Zoned Comfort ... Do not mount the control panel on any part of the heating/cooling equipment or ... allowing for control of a humidifier. b. HUM LEDlights when the relay is closed. .... on the fan (G output terminal) with a heat call (W1output ..... Run wire between the HVAC equipment and the control panel. 3.Missing: 6303

If your humidifier is wired to run only wen your fan is on. if your water supply is could you will not get any humidity unless the heat in on. you need to connect the humidifier to hot water then you can keep the fan on the on positions by your thermostat and set your hemostat to 35% hum.